Hey there Gladiators, I'm coming back to WoW, never played MoP yet, but reading topics here sucked me back in the game. You folks are those who keep this game interesting imo, not dragons and shit.
Well I've got a Rogue and DK taken to 85, Mage is 83 or something. I'm ready to roll another class for the sake of it, I just want to ask: which class do you think is the most enjoyable solo or at random BGs? I mean, able to really tip the scale with skillfull gameplay.

Rogues will be very strong and skillfull, next season. If you want to do some fancy shit in bgs rogues are probaly it. Dks are also looking to be pretty sick, and will have some sick ass dmg in bgs if you just want to be number one in dmg meter and do massive dot dmg. I prefer rogue if its JUST for bgs.
I dont think mage is a good idea at all, gl with your decision.